#include <string.h>
#include "firmware.h"
#include "simple_uart.h"


static uint32_t calculateCRC32 (const uint8_t *pStart, uint32_t uSize);


#if 1
	#define ota_dbg  printf
#else
	#define dbg(...)  do{}while(0)
#endif

#define BOARD_MODEL 0x10373011
#define SOFT_VERSION 0x001
#define OTA_BASE 0x08200000

static uint8_t remain_buf[3], remain_len=0;	/* 发送方无法保证4字节对齐时需要用到 */

static int32_t _ota_flash_erase(void) {
}

static void _ota_flash_write(uint32_t addr, uint32_t *data, uint32_t len) {

}

static int32_t _ota_msg_ack_rxlen(uint32_t total_rlen) {
    uint8_t buf[4];
    uint32_t *p = (uint32_t*)&buf;
    *p = total_rlen;
    simple_uart_send(buf, 4);
}

static uint8_t _ota_bak_sector_verify(void) {
//    bin_head *app_head= (bin_head*)ADDR_FLASH_SECTOR_BAK;
//    if(0 != verify_app_head(app_head)){
//    	if(1 == verify_app_data((u8*)ADDR_FLASH_SECTOR_BAK)){
//    		
//    		printf("升级文件验证OK，5s后重启开始升级\r\n");
//    		write_restart_cmd(5);
//    		return;
//    	}
//    }
    return 1;
}

void firmware_write_flash(uint32_t write_addr, updata_bak_region *firmware, uint32_t total_rlen)
{
	uint32_t rlen, write_len, file_len;
	uint8_t *write_buf;
	file_len = firmware->file_len;
	rlen = firmware->data_len + remain_len;		//加上剩余的
	if( remain_len > 0 ) {
		ota_dbg("remain_len = %d", remain_len);
		write_buf= (uint8_t*)(firmware->flash_data) - remain_len;/* 占用头部的一部分 */
		(void)memcpy(write_buf, remain_buf, remain_len);
	} else {
		write_buf= (uint8_t*)firmware->flash_data;
	}
	if(total_rlen < firmware->file_len) {
		remain_len= rlen%4;	//还没有收完，计算剩余长度	
		write_len=  rlen/4;
	} else {
		remain_len=0;
		write_len=  (rlen+3)/4;
	}
	_ota_flash_write(write_addr, (uint32_t*)write_buf, write_len);
	_ota_msg_ack_rxlen(total_rlen); /* 通知主机本次接收成功 */
	ota_dbg("ack len:%d\r\n", total_rlen);		
	if( total_rlen >= firmware->file_len ){
		ota_dbg("ota文件接收成功%d/%d\r\n", total_rlen, firmware->file_len);
        if( _ota_bak_sector_verify() ) {
            ota_dbg("ota文件校验成功\r\n");
        }else {
            ota_dbg("ota文件校验失败\r\n");
        }
	}
}

void msg_firmware_handle(uint8_t *msg_buf, uint32_t msg_len)
{
	static uint32_t ack_len = 0;
	uint32_t rlen = msg_len, write_addr = 0;
	updata_bak_region *firmware= (updata_bak_region*)msg_buf;
    ota_dbg(" model %08x version %08x\r\n",firmware->model, firmware->version );
    if(firmware->model != BOARD_MODEL || rlen <= BAK_REGION_HEAD_LEN) {
        _ota_msg_ack_rxlen(OTAMSGERR_MODEL); /* 通知主机产品号错误 */
        ota_dbg("model don't match %x %x\r\n", firmware->model, BOARD_MODEL);
    }else if(firmware->version <= SOFT_VERSION) {
        _ota_msg_ack_rxlen(OTAMSGERR_VERSION); /* 通知主机版本号错误 */
        ota_dbg("version don't match %x %x\r\n", firmware->version, SOFT_VERSION);
    }else {
        rlen -= BAK_REGION_HEAD_LEN;
		if(rlen != firmware->data_len){
			ota_dbg("rec len err, %d / %d \r\n",rlen, firmware->data_len);
			return;
		}
		uint32_t crcval= calculateCRC32((uint8_t*)firmware->flash_data, rlen);
	 	ota_dbg("crc val= %08x / %08x\r\n", crcval, firmware->crc32val);
		if(crcval == firmware->crc32val){
			if(firmware->region_idx == 0){ /* 第一帧 */
				ack_len = 0;
				remain_len = 0;
				if( _ota_flash_erase() ) {
                    _ota_msg_ack_rxlen(OTAMSGERR_OTHER); /* 通知主机错误 */
                    ota_dbg("ota flash erase faild\r\n");
                    return;
				}else {
				    ota_dbg("ota flash erase success\r\n");
                }
			}
			else if(firmware->region_idx != ack_len){
				ota_dbg("ota msg warning: recv %d, pend %d \r\n",firmware->region_idx, ack_len);
				return;
			}
			/* 等价于 write_addr = OTA_BASE + (ack_len/4)*4; */	
			write_addr = OTA_BASE + ack_len&0xFFFFFFFC;	
			ack_len+= rlen;
			firmware_write_flash(write_addr, firmware, ack_len);
		}
    }
}



static uint32_t calculateCRC32 (const uint8_t *pStart, uint32_t uSize)
{
    
  static const uint32_t CRC32_Table[256] =
  {
     0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
     0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
     0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
     0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
     0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
     0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
     0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
     0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
     0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
     0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
     0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
     0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
     0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
     0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
     0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
     0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
     0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
     0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
     0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
     0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
     0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
     0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
     0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
     0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
     0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
     0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
     0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
     0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
     0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
     0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
     0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
     0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
     0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
     0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
     0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
     0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
     0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
     0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
     0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
     0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
     0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
     0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
     0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
     0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
     0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
     0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
     0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
     0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
     0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
     0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
     0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
     0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
     0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
     0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
     0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
     0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
     0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
     0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
     0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
     0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
     0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
     0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
     0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
     0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
  };
  uint32_t uCRCValue;
  uint8_t *pData;

  uCRCValue = 0xFFFFFFFF;
  pData = (uint8_t*)pStart;
  while (uSize --)
  {
    uCRCValue = CRC32_Table[(uCRCValue ^ (*(pData++))) & 0xFF] ^ (uCRCValue >> 8);
  }
  return uCRCValue ^ 0xFFFFFFFF;

}




